Around 21 BBY, tensions between the Mon Calamari and the Quarrens rose high after the king of the Mon Calamari Yos Kolina was found assassinated. The tension erupted into war between the two species, each calling their their allies.
During the battle, Prince Lee-Char, Kolina's son and heir to the throne, was captured by the CIS. Tamson scheduled his public execution in front of his prisoners of wars, which included Gial Ackbar, Jar Jar Binks, Anakin Skywalker, Padmé Amidala and Kit Fisto. The Karkarodon along with twoothers was to execute Lee-Char. However, QuarrenchieftainNossor Ri, who began to doubt his allegiance with the CIS had a change of heart and rallied the Quarrens to fight for Lee-Char and the Republic. Ri rescued Lee-Char just as the Karkarodons were about to execute him and gave him a weapon. Lee-Char then killed all the three Karkarodons with it. The battle was eventually won by the Republic.